Emergency responders performed CPR on an individual suffering from cardiac arrest at the late Sen. Lindsey Graham's Washington home Saturday night before he was pronounced dead, according to dispatch audio reviewed by The Wall Street Journal.
The Journal reported that D.C. Fire and EMS crews were dispatched shortly before 8:30 p.m. to a residence on South Capitol Street, an address listed in public records as belonging to Graham, after receiving a report of chest pain.
According to the dispatch audio, a woman who called 911 said she was driving from Baltimore and told dispatchers that the home's front door was unlocked. When first responders arrived, however, they found the deadbolt locked and received no response after repeatedly knocking.
About five minutes after arriving, firefighters requested assistance from the Metropolitan Police Department and said they would force entry into the residence.
Roughly 15 minutes later, responders radioed that CPR was underway, prompting dispatchers to send an EMS supervisor to assist with what was described as a cardiac arrest.
The dispatch recordings did not identify the patient by name and referred to the individual as 73 years old, the report said. Graham was 71, suggesting the age reported over dispatch may have been inaccurate.
Graham's office said Sunday that the South Carolina Republican died after a "brief and sudden illness." Preliminary examination findings indicated that the cause was an aortic dissection resulting from arteriosclerotic cardiovascular disease.
Law enforcement officials told the Journal that medical testing, including an autopsy and toxicology testing, could take weeks before the cause of death is determined.
Sen. Ron Johnson, R-Wis., said he hopes authorities conduct "a full toxicology and autopsy" on Graham, noting that the senator's father died of a heart attack.
President Donald Trump told CNN that Graham called him around 6:30 p.m. Saturday after returning from a trip to Ukraine.
"He said, 'I'm tired because it's a long trip,' but other than that he was fine," Trump said.
FBI Director Kash Patel said Sunday that the bureau is assisting local authorities and has made "every necessary resource available" to the investigation. The Journal reported that FBI agents were at Graham's home Sunday afternoon as part of that effort.